iPhone 5 showdown

"However, things are going smoothly at all our stores," the representative said.

While figures are few and far between for now, AT&T - which was the first and only U.S. carrier to pick up Apple's iOS handsets for quite some time - reportedly grabbed the majority of orders for the phone.

When pre-orders for the iPhone 5 started Sept. 14, the carrier reported record-breaking sales over opening weekend. According to ComScore, a data collection firm, AT&T nabbed 68 percent of pre-orders for the iPhone 5.

Verizon, by contrast, took 25 percent of orders while Sprint grabbed eight.